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Andrew Soule of United States races during the 15km men's cross country ski, sitting event at the 2014 Winter Paralympic, Sunday, March 9, 2014, in Krasnaya Polyana, Russia. (AP Photo/Dmitry Lovetsky)

South Korea and United States players in action during their ice sledge hockey match at the 2014 Winter Paralympics in Sochi, Russia, Sunday March 9, 2014. United States won the match 3-0. (AP Photo/Pavel Golovkin)

Gregor Ewan of Great Britain smiles during round robin session wheelchair curling match against South Korea at the 2014 Winter Paralympics in Sochi, Russia, Sunday, March 9, 2014. Great Britain won 8-4. (AP Photo/Pavel Golovkin)

Graeme Murray of Canada, top, and Emil Kirstistuen of Norway in action during an ice sledge hockey match between Canada and Norway at the 2014 Winter Paralympics in Sochi, Russia, Sunday, March 9, 2014. Canada won 4-0. (AP Photo/Pavel Golovkin)

Russian soldiers prepair the flags of the USA (L) and Russia during a medal ceremony at the Winter Paralympics 2014 Sochi in Krasnaya Polyana, Russia, on March 9, 2014. EPA/ENNIO LEANZA

Russia's Roman Petushkov (R) competes to the first place during the Men's 15 km Cross-Country Ski Sitting at XI Paralympic Olympic games in the Rosa Khutor stadium nearSochi on March 9, 2014. KIRILL KUDRYAVTSEV/AFP/Getty Images

Nikko Landeros of USA takes a tumble during the Ice Sledge Hockey Preliminary Round Group B match between the USA and Korea at Shayba Arena on March 9, 2014 in Sochi, Russia. (Photo by Harry Engels/Getty Images)

Russia's Svetlana Konovalova competes to get third place during Women's 12 km Cross-Country Ski Sitting at XI Paralympic Olympic games in the Rosa Khutor stadium near Sochi on March 9, 2014. KIRILL KUDRYAVTSEV/AFP/Getty Images

Daniel Cnossen of the United States crashes during the men's 15-kilometer cross country ski sitting event at the 2014 Winter Paralympics, Sunday, March 9, 2014, in Krasnaya Polyana, Russia. (AP Photo/Dmitry Lovetsky)

Oksana Masters of the United States races to win the silver medal in the ladies 12-kilometer cross country ski sitting event at the 2014 Winter Paralympics, Sunday, March 9, 2014, in Krasnaya Polyana, Russia. (AP Photo/Dmitry Lovetsky)

Russia's Roman Petushkov competes to the first place during Men's 15 km Cross-Country Ski Sitting at XI Paralympic Olympic games in the Rosa Khutor stadium near Sochi on March 9, 2014. KIRILL KUDRYAVTSEV/AFP/Getty Images